Abstract: Disclosed are granular automatic dishwashing detergent compositions containing an insoluble inorganic zinc salt useful for inhibition of glassware corrosion in the dishwasher. These compositions are particularly desirable because use of them in the dishwasher does not result in precipitation of zinc insolubles on the dishware or dishwasher parts.

Abstract: A solid cast block of corrosion inhibitor composition, comprising: (i) about 5 to 20 wt-% silicate, calculated as sodium metasilicate pentahydrate; (ii) about 5 to 90 wt-% borate, calculated as sodium tetraborate pentahydrate; (iii) about 0.5 to 5 wt-% polymeric dispersant such as polyacrylamide; and (iv) a sufficient solidifying amount of water.

Abstract: The invention relates to a process making it possible to reduce the corrosion of metals and alloys of heat exchanger circuits where aqueous heat transfer fluids are circulating and which may contain anti-freeze products.The process consists in mixing with these aqueous heat transfer fluids on the one hand from 0.05 to 5 percent by weight of one or more salts of alkali metals or of amines of dicarboxylic aliphatic acids of the formula (CH.sub.2)n(COOH).sub.2 in which n is comprised between 2 and 10 and on the other hand from 0.05 to 2.5 percent by weight of one or more polyols comprising a number of carbon atoms between 5 and 12 and a number of alcohol functions between 5 and 12 and possessing no reducing power.

Abstract: Disclosed is a process for scrubbing acid gases from an H.sub.2 -containing acid gas stream by use of an aminecontaining aqueous scrubbing solution wherein the corrosion of metal surfaces in contact with such a solution is inhibited by use of an effective amount of sulfide dioxide.

Abstract: A corrosion inhibited sodium and calcium chloride composition preferably in granular form, which is uniformly coated with a minute to minor quantity of an inhibitor comprising chiefly superphosphate and a minor amount of magnesium oxide. There is also disclosed a method for inhibiting corrosion of sodium and calcium chloride which comprises supplying to the metal surface which is exposed to corrosive attack by sodium and calcium chloride, a minute quantity of an inhibitor comprising chiefly superphosphate and a minor amount of magnesium oxide. The magnesium oxide functions to cement the inhibitor as a tenacious coating on the salt granules, and also to enhance the effectiveness of the phosphate corrosion inhibition.

Abstract: A method for inhibiting sulfide stress corrosion cracking and hydrogen induced stepwise cracking in a metal (e.g. pipeline steel) that comprises contacting the metal at a pH of 5.3 or below with an effective inhibiting amount of a glycolipid-containing product obtained from a fermentation using Torulopsis bombicola.

Abstract: A rust converting composition comprises ascorbic acid, lignin sulfonate, and a water insoluble polymer, such as polyvinylpyrrolidone, and optionally a thickener. The invention further provides a method for removing rust from rusted metal surfaces by applying the composition, allowing the composition to remain on the rusted metal surface until substantially all of the rust is converted to a water soluble form, and removing the composition from the metal surface by washing with water.

Abstract: A deicing composition is provided which comprises a solid mixture of sodium chloride and a corrosion inhibitor comprising a water-soluble divalent metal ion and an alkali metal polyphosphate selected from the group consisting of tripolyphosphate, pyrophosphate, hexametaphosphate and mixtures thereof, wherein the inhibitor is present in an amount effective to reduce the rate of corrosion of ferrous metals by aqueous sodium chloride solutions.

Abstract: A process which comprises contacting the surface of a metal with an alkyl or acyl substituted catechol.The contacting may be effected using the substituted catechol alone or in a suitable medium for example as a solution or emulsion. The contacting is effective in providing corrosion inhibition even with lightly rusted iron surfaces.

Abstract: A composition and method for inhibiting corrosion in industrial cooling waters which contain hardness and have a pH of at least 8, which composition comprises a water-soluble organic phosphonate capable of inhibiting corrosion in an aqueous alkaliine environment and a hydrocarbon polymer containing an N-substituted acrylamide polymer with an amide structure as follows: ##STR1## where R.sub.2 is hydrogen or methyl, R.sub.1 is a hydrogen or an alkyl and R is alkylene or phenylene, and X is sulfonate, (poly)hydroxyl, and combinations thereof.

Abstract: A method for inhibiting corrosion in industrial cooling waters which contain hardness and a pH of at least 6.5, by dosing the water with a composition which comprises a water-soluble inorganic phosphate capable of inhibiting corrosion in an aqueous alkaline environment and a hydrocarbon polymer containing an N-substituted acrylamide polymers with an amide structure as follows: ##STR1## where R.sub.2 is hydrogen or methyl, R.sub.1 is a hydrogen or an alkyl and R is alkylene or phenylene, and X is sulfonate, (poly)hydroxyl, (poly)carboxyl or carbonyl, and combinations thereof; or containing derivatized maleic anhydride homo-, co- and terpolymers having N-substituted maleamic acid units, N-substituted maleimide units and maleic acid (and salts) units having a structure as follows: ##STR2## where R.sub.1, R.sub.2 and R.sub.

Abstract: The subject invention relates to a polyhydroxy alcohol-based antifreeze concentrate for engines containing aluminum parts which utilizes certain heteropolymolybdate compounds as corrosion inhibitors for aluminum parts. In addition, the antifreeze contains conventional components such as a buffer, silicate, and nitrate.

Abstract: The corrosion of metals in closed, aqueous cooling systems having a pH of 7.5 to 10.5 is inhibited by adding to the system a coolant concentrate comprising water, at least 10% by weight of a water soluble nitrite or a mixture of a water soluble nitrite and a water soluble nitrate, 0.2 to 2.0% by weight of at least one water soluble azole, and 0.1 to 1.0% by weight of a water soluble molybdate, to provide in the system concentrations of at least 200 ppm of the nitrite or nitrite/nitrate mixture, 2 to 20 ppm of the azole and 1 to 10 ppm of the molybdate.

Abstract: A corrosion inhibiting composition including a solution of at least one alkali or alkaline-earth metal halide in water and specific corrosion inhibiting concentrations of zinc ions and thiocyanate ions, for use in well drilling, completion, packer fluid and workover operations.

Abstract: A heavy duty supplemental cooling composition for use in diesel engines which comprises a sodium-free buffer, a cavitation liner pitting inhibitor, a metal corrosion and hot surface corrosion inhibitor, a defoamer, a hot surface deposition and scale inhibitor and a detergent. An internal leakage trace element is included to detect leakage into the engine's lubricating oil.

Abstract: Compositions of the invention comprise an organic film-forming resin and a cyanamide salt of a non-lead metal. The composition, when applied to a thin metallic film, inhibits degradation of the thin metallic film as compared to the composition without calcium cyanamide. Processes comprising the step of applying a composition of the invention to a thin metallic film and articles comprising a thin metallic film and a layer of a hardened composition of the invention are also disclosed.

Abstract: A weldable steel plate plated with zinc, a zinc base alloy or zinc composite and coated on the plating with a coating material comprising a mixture of at least one type of ferrous alloy powder with an oxygen concentration of 1.0% by weight or less and zinc dust, is provided, and the weldable coated steel plate also has good workability, coherence, weldability and corrosion resistance.

Abstract: A process for producing corrosion inhibiting particles comprising binding corrosion inhibiting cations by ion-exchange to particles of silica or alumina, which preferably have a BET surface area of at least 500 m.sup.2 /g, to form cation exchanged particles, the cations of which are releasable by further ion-exchange, the BET surface area of the cation-exchanged particles being reduced, preferably to less than 150 m.sup.2 /g, by subjecting the cation-exchanged particles to a heat treatment which comprises heating the particles at a temperature of from 50.degree. to 120.degree. C. while maintaining the water content of the particles at more than 15% by weight, followed by heating with removal of water to dry the particles. An embodiment of the invention comprises heating a slurry of the cation exchanged particles followed by drying e.g. spray drying.

Abstract: An improved makeready packing for preventing corrosion of cylinders of offset or lithographic printing presses which comprises providing a cylinder surface contacting packing element having a corrosion inhibitor applied thereto in such a manner that the inhibitor will effectively protect the entire surface of the cylinder.

Abstract: A novel bellows expansion joint design and method of preventing stress corrosion cracking incorporates an internal cylindrical weir or sleeve which defines an inner flushing chamber adjacent the expansion bellows wherein connections are provided on the exterior wall of the expansion joint body to allow the admission of a chemical solution or treating fluid directly onto the inside surface of the bellows from an external connection to the expansion joint. In addition, a further connection is provided to a second flushing chamber surrounding the exterior of the bellows so that a similar solution may be admitted and allowed to overflow from an upper portion of the chamber.

Abstract: The instant invention is directed to an admixture, and its use in inhibiting scale and corrosion in aqueous systems, comprising:(a) a water-soluble polymer having a weight average molecular weight of less than 25,000, as determined by low angle laser light scattering, comprising an unsaturated carboxylic acid and an unsaturated sulfonic acid, or their salts, having a ratio of 1:20 to 20:1, and(b) at least one compound selected from the group consisting of water-soluble polycarboxylates, phosphonates, phosphates, polyphosphates, metal salts and sulfonates.The instant invention is also directed to a method of inhibiting the formation of insoluble alluvial, metal oxide and metal hydroxide deposits in an aqueous system, comprising adding to the system at least 0.

Abstract: The present invention is directed to a composition useful for inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising mercaptothiazoline and ferrous ions.The present invention is also directed to a method of inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising maintaining in the aqueous system at least about 1 ppm (parts per million) of mercaptothiazoline, preferably in combination with ferrous ions.

Abstract: A process for producing corrosion inhibiting particles comprising binding corrosion inhibiting anions to particles of an inorganic oxide by ion-exchange to form anion-exchanged particles, the anions of which are releasible by further ion-exchange in which the inorganic oxide particles having surface hydroxyl groups are first contacted with an acidic solution containing labile anions at a pH sufficiently below 7 for the protons of the hydroxyl groups to be replaced by the labile anions and thereafter contacting the particles of the labile anion-exchanged inorganic oxide with a solution containing the required corrosion inhibiting anions so that the labile anions are replaced by the corrosion inhibiting anions. The labile anions are anions of water soluble, acid compounds which have a lower affinity for the oxide surface than the required corrosion inhibiting anions and which form a soluble salt with the cation of the compound providing the corrosion inhibiting anions.

Abstract: Salts having the formula:Y--NH.sub.3.sup.+.RCO.sub.2.sup.- Iin which Y is a group of formula R.sup.1 XCH.sub.2 CH(OH)CH.sub.2 --, R and R.sup.1 are the same or different and each is a straight- or branched chain alkyl group having from 1 to 18 carbon atoms, a straight- or branched chain alkenyl group having from 2 to 18 atoms, a cycloalkyl group having from 4 to 12 ring atoms, an aryl group having 6-10 ring atoms, or an aralkyl group having from 7 to 10 carbon atoms; and X is O, CO.sub.2, NR.sup.2 or S and R.sup.2 is hydrogen, a straight- or branched chain alkyl group having from 1 to 18 carbon atoms or an alkenyl group having from 2 to 18 C atoms.

Abstract: The addition of a small amount of hydrogen or a hydrogen-liberating compound such as a metal hydride to a caustic solution serves to suppress the corrosive effect of the solution on nickel-based surfaces. Typical nickel-based surfaces include caustic evaporator surfaces which contain a caustic solution maintained at a temperature of from about 130.degree. C. to about 180.degree. C. A preferred metal hydride is sodium borohydride which is preferably present in an amount of from about 5 ppm to about 100 ppm. Concentrated caustic solutions containing less than 0.5 ppm of nickel can be prepared by this process.

Abstract: Compositions and methods for chemically scavenging oxygen from an aqueous medium are disclosed. Salicylaldehyde catalyzed by hydroquinone can be used as an oxygen scavenger in any aqueous medium, but is especially well adapted for use in boiler water systems.

Abstract: A method and composition for corrosion protection of metal components of a fluid circulation system utilizing a buffered solution containing perchlorate ion and specific operative additives.

Abstract: A paint composition for inhibiting corrosion of a metal surface includes a powdered sacrificial metal for that surface and a powdered water soluble corrosion inhibiting glass. Typically the paint is a zinc rich paint and the glass is a calcium/zinc phosphate glass.

Abstract: A method for controlling, preventing, or removing fouling deposits comprising microencapsulating fouling control chemicals in a slow release capsule. The microcapsules are applied to the substrate to be treated, where they stick to the substrate and slowly release the active treating agents.

Abstract: An improved sheet material for corrosion inhibition of the surfaces of packaged ferrous metal products which comprises a sheet material substrate having a vapor phase corrosion inhibitor composition applied as a printed pattern of uniformly distributed spaced - areas of predetermined size occupying about 25% of the total area of the treated sheet and consisting of a total dried weight of about 0.226 to 0.302 grams of the inhibitor composition per square foot of the treated sheet.

Abstract: The present invention relates to a process for scavenging hydrogen sulfide which frequently becomes entrained in drilling fluid during the course of drilling operations through subterranean formations. The process consists of introducing a solid oxidant in powdered form into the circulating drilling fluid when hydrogen sulfide is encountered. The solid oxidants are selected from the group consisting of calcium hypochlorite (Ca(OCl).sub.2), sodium perborate (NaBO.sub.3), potassium permanganate (KMnO.sub.4), and potassium peroxydisulfate (K.sub.2 S.sub.2 O.sub.8). The solid oxidants are soluble in the drilling fluid, promoting fast and complete scavenging reactions without adversely altering the drilling fluid rheology.

Abstract: A reduced pollutant-containing salt mixture and method of making same is provided wherein a salt mixture partially comprised of calcium acetate and partially comprised of at least one other pollutant salt is produced by mixing a pollutant salt-containing solution and a calcium acetate-containing solution and converting said mixture into a solid salt containing both the pollutant salt and the nonpollutant calcium acetate. A process option involves chemically reacting calcium chloride and calcium acetate in a calcium chloride-to-calcium acetate mole ratio in the range from 0 to 1 to produce a non-deliquescent salt. A further process option includes mixing either dry calcium chloride or dry sodium chloride with dry calcium acetate to obtain a reduced pollutant-containing salt mixture.

Abstract: This invention relates to the use of phospho-compositions, for example phosphates, pyrophosphates, polyphosphates, organophosphates, etc., as corrosion inhibitors in oxygen-containing aqueous systems of particulate matter such as slurries of solids, such as coal, etc.

Abstract: A metallic chloride based creosote and soot removing composition including a phosphate corrosion inhibitor to reduce the corrosive attack on metal flue pipes is provided. The composition includes between about 15-60% metallic chloride, 20-60% trisodium phosphate dodecylhydrate, 15-60% anti-cake agents, such as non-swelling clay, sodium sulfate and tricalcium phosphate and 2-10% combustion initiator, such as wood flour.

Abstract: A non-corrosive aqueous solution of a copper nitrate which contains at least 30% by weight of copper nitrate, from 1-5% by weight of boric acid based on the weight of the copper nitrate, and from 0.2-3.0% by weight of EDTA based on the weight of the copper nitrate.

Abstract: pH in the range of 9 to 10.5 can be maintained at elevated temperatures over an extended period by the decarboxylation of bicarbonate or carbonate ion present in a coolant composition free of phosphate and borate compounds.

Abstract: A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes. The calcium acetate salt product can be mixed with an inert solid material having good anti-slip properties.

Abstract: A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes.

Abstract: An improved method for removing acidic gases from a gas stream containing the acidic gases is disclosed in which a corrosion inhibitor comprising a mixture of salts of antimony and molybdenum is added to an amine promoted alkaline salt scrubbing solution.

Abstract: Corrosion inhibiting particles comprise an inorganic oxide, particularly alumina, having corrosion inhibiting anions, particularly phosphate, chromate or benzoate anions, chemically bound to them. They may be prepared by contacting an oxide containing hydroxyl groups with an acidic solution containing the anions at ambient temperatures. The particles may be incorporated into protective coatings, e.g. paints based on epoxy resins, alkyd resins or chlorinated rubbers, in amounts up to 80% wt based on dry film weight, giving coatings with up to 4.0% corrosion inhibiting anions. Release of the anions is by ion-exchange with other anions e.g. the chloride anions of sea water or salt spray, and does not, as is normal with corrosion inhibiting coatings, depend on water solubility.

Abstract: Improved liquid, urea-sulfuric acid compositions noncorrosive to stainless steel contain about 5 to about 75 weight percent urea, about 5 to about 85 weight percent sulfuric acid, 0 to about 75 weight percent water and a corrosion inhibiting amount of a cupric ion-containing compound, in which the urea and sulfuric acid together comprise at least about 25 weight percent of the composition, and in which at least a portion of the urea and sulfuric acid are present as monourea sulfate, diurea sulfate or combinations thereof. The compositions may also contain amounts of selected dialkylthioureas sufficient to reduce their corrosivity to carbon steel.

Abstract: Improved, liquid, urea-sulfuric acid reaction product compositions, noncorrosive to carbon steel, contain about 5 to about 75 weight percent urea, about 5 to about 85 weight percent sulfuric acid, 0 to about 75 weight percent water, and a corrosion inhibiting amount of certain dialkylthioureas, in which the urea and sulfuric acid together constitute at least about 25 weight percent of the composition, the urea/sulfuric acid molar ratio of the composition is greater than 2 or less than 1, and a portion of the urea and sulfuric acid are present as monourea sulfate, diurea sulfate, or combinations thereof. The compositions can also contain corrosion inhibiting amounts of one or more cupric ion-containing compounds sufficient to reduce the corrosivity of the composition to stainless steel.

Abstract: There is provided a method for preventing corrosion in a glass-lined vessel due to HF liberated from an organic liquid medium. The method involves adding CaCl.sub.2 particles to this medium. This method is particularly useful in the chlorination of 4-chlorobenzotrifluoride to 3,4-dichlorobenzotrifluoride.

Abstract: This invention relates to a process for limiting the corrosive nature of cellulosic insulation which has been treated with a fire-retardant composition, by applying to the insulation an effective amount of an aqueous corrosion inhibiting solution. The corrosion inhibiting solution comprises an amine or alkali metal salt of an aromatic triazole, and an amine or alkali metal salt of an organic phosphate ester acid.

Abstract: A magnetic tape cassette comprises a pad support membrane made of a metal alloy such as bronze and nickel silver. The pad support membrane is coated with a synthetic resin layer containing a rust inhibitor.

Abstract: A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes.

Abstract: Process for inhibiting the corrosion of equipment made of titanium or of alloys containing titanium by a solution containing a peroxy compound. To effect the inhibition, a solution containing calcium, strontium or barium ions is used.

Abstract: The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a di- or triamine. A surprising fact is that some of the amine co-inhibitors have been identified by others in the art as promoting ferrous metal corrosion.

Abstract: The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a soluble cobalt salt. This system allows the use of higher amine concentrations which in turn allows a higher carbon dioxide loading with low corrosion thereby improving the energy efficiency of the gas sweetening process.

Abstract: The disclosed wound dressings have a drug dispersed throughout a polyurethane matrix that is the reaction product of: (A) An isocyante terminated prepolymer formed by reaction of isophorone diisocyanate and a marcoglycol and (B) a monomer containing hydroxyl and vinyl groups. The reaction product is a vinyl terminated polyurethane oligomer which is liquid at room temperature and which may be readily admixed with a pharmacoactive substance and a photosensitizer, formed into a film and cured by exposure to UV light without release of heat.In the most preferred embodiments the foregoing oligomer is codissolved in an organic solvent with a polyurethane polymer which is the reaction product of:dicyclohexyl methane diisocyanate;a polytetramethylene ether polyol having a molecular weight in the range of 1000-3000 daltons; and1,4-butane diol.That solution is then admixed with the pharmacoactive agent, formed into a film and cured.